Keyboard stops working when RAM reaches over 40%

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First component replacement. I replaced my mobo and Intel Core i7 processor with AMD Ryzen 5900 about 30 days ago. Got a marked improvement in performance (I mainly use the machine for editing photos and videos with Adobe software), but over the last few days the keyboard (Logitech wireless) stops working intermittently for 5-10 minutes, then work again. I replaced the keyboard batteries first, and after it made no difference I tried another wireless keyboard. Same problem. I started trying to take note of the component demand when this happens, and it looks like it happens when the RAM usage hits 40% or more. I was trying to run two monitors at once, and it was causing a lot of issues, so I disconnected one.

1. Is this normal for this RAM, which is overclocked from 2100 MHz to 3600?

2. Why just the keyboard? Keyboard and mouse use the same USB bluetooth dongle, does it make sense that only the keyboard would stop working?

3. Do I just need faster RAM?

4. I know my GPU is wrong for my setup, so this will be my next upgrade (someday if GPU madness changes).

My configuration:

Processor: AMD Ryzen 9 5900X

Mobo: Gigabyte X570S Aorus Master

GPU: NVIDIA Quadro P2000

RAM: 64 GB DDR4, 2100 MHz

Operating System: Windows 10 Professional

Am I missing something?

Thanks in advance for all the help.

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